Improvement in boring-machines



UNITED 'STATES- PATENT Fries'.

IMPRVEM ENTI'IN BORIN e-MACH INES.,

peciiication forming part of Letters Patent No. 6,909, dated November 427, 18119.

Figure 1,011 the plan which accompanies the speeiicatien,) which may be made of plank or other suitable material, and will be of convenient size if .made `-three feet long byone foot wide, or wider. Upon this base are erected' threeuprights (marked B in fFig. 1) aboutv three feet longg-the center one to be two inch es thick and three inches wide, the 'outer ones one inch thick by twowide, which are connected at the .top by 'a lcap-piece (C, one inch by two. ,l The'uprights should be placed at suitable .distances apart to support the machine.v Against these 4uprighis is placed a movable bed piece or frame D D ln-Fig. 1, six

`inches wide and three feet long, on which the carriage, Fig. 3, (lettered E E in Fig. 1,) is

l moved, and is connected with thebedpieceD D.

by `sliding clamps T T, which move in grooves U U, Inade in sai-d bed-piece, Fig. 1. .In this carriage is fixed an arbor L L, n which a bit or auger maybe inserted at V- and fastened Withscrew marked WV.. At'the .other end of this arbor is li-Xed a beveled gear-wheel (lettered I) about three-inches in diameter, gearing with the .beveled drivingewhee'l F, which is about six inches in diameter anddriven by crank M; Near the driving-wheel F is a spur gear-wheel, (marked 11,) which revolves en axle Y, Fig.- 3, in the carriage E E, and which gears :in the-inclini K,Fig.2. A Attached horizontally to bed`-piecelD D,\Fig`.` 1,011 the drivingshaft (marked X) is a sliding gearfwheel, (1st tered G,-) whiehslides on shaft X, and when ingear with wheel H withdraws the auger by the ,direct motion of fthe crank M. The bed'- 'piece D D is connected with the plate of iron N, which is fastened to the center post hy bands which slide on said upright -in such, a 'manner as to be easily raised or loweredand fastened by pin, screw, or other suitable fast-y ening. l Onthe outside of bed-piece D D is anotherplate of iron O O,.which is secured. to plate N N by horizontal posts P P P in such a manner that the bed-piece D'D may revolve freely on the uppermost-post P.` 'A halfcircle piece, (lettered R RL in the plan,).made -of metal, can be markedwith degrees.iand;is attached to the bed-piece D D1 at each ex` tremity, Aby, means of which and button S the bedpiece can be made stationary at any an gie. .The size and proportions here given are convenient for common use; 'but any other may .be adopted. 1

What I claim as my invention, and desire to secure by Letters "Patent, is-

Thecombination ot' three principles-mamely, first, the manner in which the bed-piece (to which the carriage is connected) is raised or lowered, as above described; second,'the

manner in which the bed-piece may revolvel to set the auger at `any 'angle or degree; third, the manner in which the auger is with- Ydrawn by the direct motion of the crank.

JAMES H. ALDRICH.

Witnesses:

SAMUEL-BAKER, ALFRED M. IIoY'r. 

